<!doctype html>
<html>
<body>
<script>
  var iframeElement = document.createElement('iframe');
  url = window.location.href;
  iframeElement.src = url.substr(url.indexOf('=') + 1);
  document.body.appendChild(iframeElement);

  function runTest() {
    iframeElement.contentWindow.postMessage('', '*');
  }

  window.addEventListener('message', function (evt) {
    document.title = evt.data;
  }, false);
</script>
</body>
</html>
